Focus mode — hide navigation
A button toggles hiding the header, sidebar and footer so you can focus on the content.
Code to copy
var hidden = false;
var sels = 'header, nav, aside, footer, [role="banner"], [role="navigation"]';
var btn = document.createElement('button');
btn.textContent = 'Focus';
btn.style.cssText = 'position:fixed;bottom:20px;left:20px;z-index:99999;padding:8px 14px;border:none;border-radius:4px;background:#006870;color:#fff;cursor:pointer';
btn.onclick = function () {
hidden = !hidden;
document.querySelectorAll(sels).forEach(function (el) {
el.style.display = hidden ? 'none' : '';
});
btn.textContent = hidden ? 'Show' : 'Focus';
};
document.body.appendChild(btn);How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
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